Hello Brendan,
Thanks for this good information! I am not used to take this kind of dietary supplement but I will give it a try. Which seller do you trust in taobao? Also, when you refer to the Chengdu reseller, do you mean he has like a shop somewhere in town?
Another question, I found a “B complex – B12” from Puritan’s Pride in taobao but the dose of B12 is of about 100mcg, this seems like a lot since the normal and necessary dose is of about 3mcg a day for adults. Do you take this daily or once every two or three days?